I think Guest Blogging is better than forum posting and blog commenting, but I do think that all three should be done to drive traffic to your site. The more approaches the better.
I think both is good and very easy, posting your link in your signature and answer to topics, you will get many backlinks and post in dofollow blogs are easy too but please don't spam!
Well, unless you use black hat techniques, which I highly DO NOT recommend, I personally use article marketing and press release submissions as the best way of getting backlinks to my websites. Not only are you showing quality content to your readers, you are also getting, sometimes, instant traffic to your articles and backlinks - as long as you know how to write. If writing is not of your forte, you could always outsource to those who can...
As a start, do-follow forums according to your niche are the great places to start building your links. I found a thread with large lists of forums where you could promote your website as well: http://forums.digitalpoint.com/showthread.php?t=1744907&highlight=dofollow+forums Cheers!
i think that forum postings are better than blog comments but if you want good results it is best to do both.
There are way more blogs with dofollow comments than forums...so I think it's better to invest your time in blogs
For the best link building is Blogging. Especially if we are commenting on DoFollow blogs and has a high PR. Besides, can also increase traffic to your blog.
I like forums like DP, as it is easy to get backlink while discussing any topic. Forums are more interactive so it also keep us interested.. In forums, you just have to read small question/article and you can give your opinion but, in a blog, you will have to read full article that's take much time and there is no guarantee that blog owner will approve it and also it takes time to search for dofollow blog. So my vote is with Forums.
Both are good. if the blogs are dofollow and hae top commentator plugin, you can get far more incoming links than forum discussion.
Both are good. but see what you can create fast, anchor text and in numbers and get these backlinks crawled. I enjoy forum posting because 1) you dont need to wait for approval 2) your anchor text can not be a reason 3) you can get them fast in more nos getting backlinks is one part pf the game. google noticing yoru backlinks is the other part If you think google will crawl them overnight its not possible and never do anything too make google crawl them quickly..
they are both good, however commenting on blogs that are related to yours and allow the dofollow tag might give a better result then just commenting on forums... concentrate on quality backlinks from websites related to yours rather then quantity!